ISUZU KB P190 2007 Workshop Repair Manual

REAR AXLE 4B-47
Checkpoint Trouble Cause Countermeasure

Replace the drive pinion and
the ring gear as a setExcessive ring gear run-out
Replace the drive pinion and
the ring gear as a setDrive pinion and/or ring gear
damage
NG
NGDrive pinion and ring gear
Continued from the previous page
Replace the drive pinion and
the ring gear as a setW orn drive pinion and ring
gear
NG



2) Noise when the Vehicle is Coasting

Checkpoint Trouble Cause Countermeasure

Replace the ring gear and the
pinion as a setRing gear damaged
Adjust the backlashInsufficient backlash
OK
Ring gear NG
NG
Drive pinion and ring gear
backlash



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ISUZU KB P190 2007

4B-48 REAR AXLE
3) Intermittent Noise

Checkpoint Trouble Cause Countermeasure



Axle case inside


Ring gear


Remove the foreign material


Replace the drive pinion and
the ring gear as a set


Foreign material in the axle
case


W arped ring gear


Differential cage

Tighten the differential cage
bolts


Replace the shaft


Loose differential cage bolts


Too much spline play

OK NG
NG
NG
NG
OK
OK
Axle shaft



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ISUZU KB P190 2007

REAR AXLE 4B-49
4) Noise when the Vehicle is Turning

Checkpoint Trouble Cause Countermeasure



Differential cross pin


Side gear


Replace the differential cross
pin


Replace the side gear


W orn differential cross pin


W orn side gear


Differential pinion

Replace the differential pinion


Replace the rear axle shaft


W orn differential pinion


W orn rear axle shaft splines

OK NG
NG
NG
NG
OK
OK
Rear axle shaft



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ISUZU KB P190 2007

4B-50 REAR AXLE
5) Constant Noise

Checkpoint Trouble Cause Countermeasure

Replace the rear axle shaftBent rear axle shaft
NG
Replace the side bearing
Replace the drive pinion
bearing
Replace the drive pinion and
the ring gear as a set
Replace the drive pinion and
the ring gear as a set
Flat spot on the side bearing
oil seal
BearingFlat spot on the drive pinion
Flat spot on the gear teeth
pilot bearing wear
Drive pinionFlat spot on the drive pinion
gear teeth
Ring gear
Replace the drive pinion and
the ring gear as a setW orn pinion splines oil seal
NG
NG
NG
NG
NG
OK
OK
OK
Rear axle shaft



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ISUZU KB P190 2007

REAR AXLE 4B-51
2. VIBRATION

Checkpoint Trouble Cause Countermeasure

Replace the rear axle shaftBent rear axle shaft
Replace the rear hub bearingW orn rear hub bearing
OK
Rear axle shaft NG
NG
Rear hub bearing



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ISUZU KB P190 2007

4B-52 REAR AXLE
3. OIL LEAKAGE
1) Differential Carrier Leakage

Checkpoint Trouble Cause Countermeasure

Correct the oil levelToo much gear oil
NG
Reapply the liquid gasket
and/or tighten the lock nut to
the specified torque
Reapply the liquid gasket
Tighten the bolts to the
specified torque
Replace the oil seal
Ring gear thrust boltLoose lock nut and/or liquid
Liquid gasket seal bed
Loose bolts
Oil sealW orn or defective oil seal
Differential carrier
Clean the air breatherAir breatherClogged air breather
NG
NG
NG
NG
NG
OK
OK
OK
OK
Gear oil level



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ISUZU KB P190 2007

REAR AXLE 4B-53
2) Axle Case Leakage

Checkpoint Trouble Cause Countermeasure

Tighten the drain plug and/or
replace the gasket(s)Loose drain plug and/or
defective gasket(s)
NG
Reapply the liquid gasket
Tighten the bolts to the
specified torque
Clean the air breather
Liquid gasket seal bad
Loose bolts
Air breatherClogged air breather
Differential carrier
Replace the axle caseAxle caseCracked axle case
NG
NG
NG
NG
OK
OK
OK
Oil filler and drain plug



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ISUZU KB P190 2007

4B-54 REAR AXLE
3) Axle Case to Inside Brake Drum Leakage

Checkpoint Trouble Cause Countermeasure

Replace the oil sealW orn or defective oil seal
NGOil seal



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ISUZU KB P190 2007

REAR AXLE 4B-55
4. POWER NOT BEING TRANSMITTED TO THE WHEELS
(PROPELLER SHAFT OPERATION IS NORMAL)

Checkpoint Trouble Cause Countermeasure

Replace the rear axle shaftBroken rear axle shaft
NG
Replace the drive pinion and
the ring gear as a setDrive pinion and ring gearBroken drive pinion and/or ring
gear
Replace the differential gears
and/or the spiderDifferential cage gearsBroken differential cage gears
and/or spider
NG
NG
OK
OK
Rear axle shaft













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ISUZU KB P190 2007

4B-56 REAR AXLE

SPECIAL SERVICE TOOL
ILLUSTRATION PART NO. PART NAME
5-8840-2831-0

Bearing Remover
5-8840-0007-0
(J-8092)

Grip
5-8840-2119-0
(J-36829)

Installer
5-8840-0079-0
(J-6627-A)

W heel Pin Remover
5-8840-2202-0


Oil Seal Installer
5-8840-2404-0

Oil Seal Installer
9-8522-1271-0
(J-8609-01)

Support Stand
5-8840-0275-0
(J-37264)

Holding Fixture
5-8840-0003-0
(J-3289-20)

Holding Fixture Base

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ISUZU KB P190 2007